Numerical study on comparison of detailed flow field and aerodynamic performance of bogies of stationary train and moving train
Numerical study on comparison of detailed flow field and aerodynamic performance of bogies of stationary train and moving train
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静止列车与运行列车转向架详细流场及气动性能对比数值研究
DOI：
10.1080/00423114.2020.1794015
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发表时间：
2020-07
影响因子：
3.6
通讯作者：
Rui Li
中科院分区：
文献类型：
--
作者：
Jiqiang Niu;Feng Liu;Yueming Wang;Rui Li
本文对静止列车和运动列车的气动力以及列车底部的流场进行了比较和分析。此外，采用风洞实验数据对所采用的数值算法进行了验证。结果表明：相对于列车和转向架的升力，列车的运动（静止和运动）明显改变了列车（无转向架）和转向架的阻力分布规律。列车运动对气动力波动的影响是显著的。列车底部速度场的分布规律和幅值受列车运动的显著影响，特别是在转向架周围区域。列车运动对压力场的影响相对较小。
In this study, the aerodynamic forces on a stationary train and moving train as well as the flow fields at the bottom of the trains were compared and analysed. In addition, the numerical algorithm used in the simulation with a stationary train was verified by wind tunnel experimental data. The results show that the distribution law of the drag of the train (without bogie) and bogies is evidently altered by the train motion (stationary and moving) relative to the lift force of the train and bogie. The effect of the train motion on the fluctuation of the aerodynamic forces is significant. The distribution law and amplitude of the velocity field at the bottom of the train are significantly affected by the train motion, particularly in the region around the bogie. The influence of the train motion on the pressure field is relatively marginal.
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